In the Documents and Contracts feature, there does not seem to be a way to define the size of the page. When I upload my letterhead as a background image for my documents, I have to specify Top and Center, and I end up with about an inch of blank space at the bottom of the page (at least, in the editor). Given that, it seems to default to a page size of 8.5" x 12".

It would be AWESOME if you could shade the border in the editor so it's obvious where the page ends.